Mies Van Der Rohe owes a debt of gratitude to Thonet and their pioneering use of beech. Van Deh Rohe would employ the use of simple shapes and use he strength of steel to design cantilevered shapes.
Beech is a tight grained timber that allowed the steaming of the wood and the immediate bending into shapes, that must have astounded when first retailed.
Or maybe they were criticised taking away the skill of the cabinet makers art. But what is in no doubt is that it helped make furniture affordable for the mass market.
http://www.classicartdeco.co.uk/furniture.php